President Barack Obama speaks during the opening ceremony of the Smithsonian National Museum of African American History and Culture on the National Mall in Washington, Saturday, Sept. 24, 2016. (AP Photo/Manuel Balce Ceneta)

First lady Michelle Obama wipes her eyes as she listens to her husband, President Barack Obama, speak at the dedication ceremony for the Smithsonian Museum of African American History and Culture on the National Mall in Washington, Saturday, Sept. 24, 2016. (AP Photo/Pablo Martinez Monsivais)